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H. H. SUMMERS.

DISK SHARPENER. APPLICATION FILED MAR. 3, 1919.

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H. H.- SUMMERS.

DISK SHARPENER.

APPLICATION FILED MAR. s. 1919.

Patented Sept. 16, 1919.

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UNITED STATES PATENT OFFICE.

HARVEY (SUMMERS, onMA vEm; IOWA.

' r al lcohom it mag concern:

- Ma'lvern in the county of Mills and State of Beitknown that I, HARVEYHiSpi unns, a citizen of the United States, residing at Iowa, haveinvented new and useful Improvements in Disk-Sharpeners, of which thefollowing is a specification.

This invention relates to sharpening means fordisks for harrows and thelike, and the principal object of the invention is to pro vide means forsharpening the disks while the implement is being used.

Another object of the invention is to provide means for adjusting thedevice to suit different implements and also to provide means forpermitting a certain amount of movement of the sharpening stone topermit it to adjust itself to the lateral movement of the disks thebearings of which have become worn or loose.

The invention also consists in certain other features of constructionand in the combina tion and arrangement of the several parts to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1shows the device applied to a disk harrow;

Fig. 2 is a side view of the device;

Fig. 3 is a view of the other side;

lcilig. 4 is a plan view with parts in section; an

Fig. 5 is a section on line 5-5 of Fig. 2;

Fig. 6 is a section on line 66 of Fig. 2;

Fig. 7 is a bottom plan View of the clamping means shown in Fig. 4;

Fig. 8 is a section on line 88 of Fig. 2.

The drawings show my invention as applied to a disk harrow, but it will,of course, be understood that the device may be attached to otherimplements which are provided with disks with but few changes in themeans for clamping the device to the implement.

In these views 1 indicates the frame of the harrow which is constructedof angle iron as shown. This frame supports the usual shafting on.whichare located the disks 2. My sharpening device comprises an arm 3 whichis provided with a slot 4 and a circular head 5. The arm between thehead and 1 Specification of Letters Patent.

t Application filed March 3, 1919. Serial No. 280,231.

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Patented Sept. 1 1919.

slot isgiven a half-turn so that the head will i lie at right angles tothe slotted part ofthe arm. A. pair of clamps 6 engage said slot andthese clamps engage one of the angle bars of the crane to hold thedevice in position on the harrow. As shown each clamp is provided with ascrew-threaded stem 7 which is engaged by a winged nut 8 for holding theclamp in the slot and a head 9 is connected with the stem, said headhaving a hook portion for engaging with the angle bar. One clamp isprovided with a short head to engage with the parallel portion of thebar while the other clamp is provided with a long head for engaging withthe other portion of the bar. The head is provided with acentrally-located opening through which passes a screw bolt 10 and withslots 11 located around said opening. These slots extend radially withrespect to the opening. The other arm 12 of the device is provided witha head 13 which is provided with a circulararranged opening 14 throughwhich the bolt 10 passes. The two heads are held in contact with eachother by means of a coiled spring 15 located on the bolt and adjusted bymeans of a winged nut 16. The head 13 is provided with a boss 17 whichcarries a spring-pressed plunger 18 which is provided with a handle 19.The end of the plunger when in projected position will engage with oneof the slots 11 so as to hold the head 13 against rotary movement on theother head.

. The arm 12 is slightly twisted so that it lies 21 which hold thesharpening stone 22 on the' arm. These clamps are provided with thecross pieces 23 for engaging one face of the arm and the clamps are heldin position by the nuts 24. By means of these clamps the stone may beadjusted to compensating for wear.

The arm 3 is secured to the angle bar of the frame by means of theclamps and then the arm 12 is adjusted to place the stone in correctposition for engaging the head of the disks to sharpen the same. Thisadjustment is secured by releasing the plunger from the slotsll and thenmoving the arm 12 to correct position. The plunger will then swing backinto normal position and engage another slot to hold the parts together.It will thus be seen that as the harrow is being used one of the diskswill be sharpened. As soon as this disk is sufliciently sharpened thedevice is moved on the frame to engage with the next disk. By markingthe frame the device may be easily set in its proper position thereonWithout loss of time. If a disk should have a Worn hearing so that thedisk will have lateral movement on its shaft the stone Will havemovementto compensate for this lack of movement by means of the spring15 so that there is no danger of breaking the device.

What I claim is: r

1. A device of the class described, comprising an arm having an enlargedhead, means for clamping the arm to the implement, said head havingslots therein, a bolt carried by said head, a second arm having anenlarged head Provided with an opening to receive said bolt, a, springon said bolt, a nut on the bolt for placing the spring under tension toyieldingly hold the heads together, a spring plunger on the second headadapted to engage With any one of the slots and a stone carried by thesecond arm.

2. A device of the class described, comprising an arm having an enlargedhead and a slot clamps engaging said'slot for clamping the arm to theimplement, a second arm having an enlarged head, means for adjust V ablyand yieldingly holdingsaid heads together and means for adjustablyholding a stone on the second arm.

In testimony whereof I aifix my signature.

HARVEY H. SUMMERS.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents. Washington, D. G.

